Please avoid using "AOLese". Even in very casual online conversation, most English speakers above the age of 14 do not use "u" and "coz" seriously.

First notebook entry: Introducing myself

I'm from Hong Kong, China and I'm learning English now.

This is a suggestion: I would avoid saying "Hong Kong, China" because everyone knows where Hong Kong is; similarly, you don't hear people say "I'm from Paris, France" or "I'm from New York City, US," etc.

So I'm glad to talk with u you and exchange ideas about learning languages and cultures as well.

I'm studying English coz because I want to study abroad.

Nice to meet u !

First notebook entry: Introducing myself

I'm from Hong Kong and I'm learning English now.

So I'm glad to talk with you and exchanging ideas about leaning laguanges and cultures.

I'm studying English because I want to study aborad.

Nice to meet you!

First notebook entry: Introducing myself

I'm from Hong Kong and I'm learning English now.

 I'm glad to talk and exchange ideas about and culture

I'm studying English because I want to study abroad. 

Nice to meet you !